#include <iostream>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <sys/time.h>

using namespace std;

void doing(int arg)
{
    cout << "------我被捕捉了 " << endl;
}
int main(int argc, char **argv)
{

    int a = 0;
    struct itimerval newact = {{3, 0}, {1, 0}};
    setitimer(ITIMER_REAL, &newact, NULL);
    signal(SIGALRM, &doing);
    while (1)
    {
        sleep(1);
        ++a;
        if(a>10)exit(0);
        cout<<"我一直在输出第 "<< a<<" 次"<<endl;
    }
    

    return 0;
}